According to The Washington Post and ABC News tracking poll, Trump has the support of 46 per cent of voters compared with 45 per cent for Clinton.

RealClearPolitics tracks all major national polls. "The department also has a policy of not taking unnecessary action close in time to Election Day that might influence an election's outcome".

She also continued to level attacks against Trump's ability to control nuclear weapons.

The Secret Service declined to officially comment on the agent's testimony and the Federal Bureau of Investigation said their agency did not have "any additional information to provide you beyond the documents that were released under FOIA [Freedom of Information Act]".

In the last few days, various polls coming out from key battleground states indicate that the polls are tightening and it might not be a cakewalk for Clinton any longer.

The daily tracking poll's latest four-night wave finds voters splitting sharply along traditional political divisions, with Trump's previously lagging support among core Republican groups now almost matching Clinton's wide support on the left. A New York Times analysis of early voting showed Democrats were slightly outpacing Republicans in swing-state turnout.

Among this group, the 77 percent that say they usually lean Democrat prefer Clinton, while the 80 percent who generally lean Republican favor Trump. As part of the process in 2015 of returning her work-related emails to the State Department, Abedin said she "looked for all the devices that may have any of my State Department" work and provided two laptops and a Blackberry to her lawyers for review.

Obama would go on to win. And, as Clinton press secretary Brian Fallon says, "Director Comey owes the public an explanation for this inconsistency".

Despite those comments, Trump campaign manager Kellyanne Conway said on MSNBC's "Morning Joe". "He has a pretty narrow or impossible path to 270" electoral votes. -Mexican border to thwart more illegal border crossings by Mexicans and immigrants from Central America. FiveThirtyEight's election forecast still has Clinton winning by a substantial margin - her odds at victory, according to the outlet's model, are 74% to Trump's 26%. "He's led Clinton numerically just twice before, (a 2-percentage-point lead) in late May, after he clinched the GOP nomination while Clinton was still in a duel with Bernie Sanders in the Democratic race". As it is, he has made the most of the news, claiming it endorses everything he has said about "crooked Hillary".

In July, Comey concluded that Clinton and her staff were "extremely careless" with their handling of classified information, but that there was not enough evidence to bring criminal charges.

But on Friday, Comey released a letter saying that new emails related to Clinton's private server were under investigation.